The plural (“when notice of it has been received by the other contracting States”: see Yearbook 1966, vol. II, p. 209, document A/6309/Rev.1) was changed to the singular, which had the advantage of underlining that the time of becoming operative was specific to each of the parties (cf. the exposition by Yasseen, Chairman of the Conference Drafting Committee, in Official Records , op. cit.
II, pág. 229, documento A/6309/Rev.1), se pasó al singular, lo que tiene la ventaja de determinar que la fecha en que surte efecto depende de cada contratante (véanse las explicaciones de Yasseen, Presidente del Comité de Redacción de la Conferencia, en Documentos Oficiales, op.